121200223131 has 80 divisors (see below), whose sum is σ = 201918024000. Its totient is φ = 71936024832.

The previous prime is 121200223099. The next prime is 121200223141. The reversal of 121200223131 is 131322002121.

It is not a de Polignac number, because 121200223131 - 2⁵ = 121200223099 is a prime.

It is a super-2 number, since 2×121200223131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121200223141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42719845 + ... + 42722681.

It is an arithmetic number, because the mean of its divisors is an integer number (2523975300).

Almost surely, 2^121200223131 is an apocalyptic number.

121200223131 is a deficient number, since it is larger than the sum of its proper divisors (80717800869).

121200223131 is a wasteful number, since it uses less digits than its factorization.

121200223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121200223131 its reverse (131322002121), we get a palindrome (252522225252).

The spelling of 121200223131 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty-three thousand, one hundred thirty-one".